Central Bureau for Astronomical Telegrams
IAUC 6124: 1995 A1; NOTICE RE NAMES AND DESIGNATIONS OF COMETS; 1994ak
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Circular No. 6124
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444 TWX 710-320-6842 ASTROGRAM CAM
MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)
COMET 1995 A1
Robert Jedicke, Lunar and Planetary Laboratory, reports his
discovery of a comet with the 0.9-m Spacewatch telescope at Kitt Peak.
J. V. Scotti adds that the middle image gives m2 = 20.9, shows a coma
of diameter 17" and a tail extending faintly out to 2'.91 in p.a. 262 deg.
1995 UT R.A. (2000) Decl. m1
Jan. 8.41727 7 56 12.11 +20 20 54.9 19.0
8.46370 7 56 10.50 +20 21 06.1
8.49853 7 56 09.37 +20 21 15.0
NOTICE REGARDING NAMES AND DESIGNATIONS OF COMETS
In accordance with the IAU resolution on MPC 23803-23804 (summarized
on IAUC 6076), the name of comet 1995 A1 will be established
in consultation with the Commission 20 Small Bodies Names Committee and
will not be announced until a preliminary orbit is available.
For convenience, we give here the correspondences between old-style and
new-style designations of comets discovered during the past six months:
1994m = C/1994 N1 (Nakamura-Nishimura-Machholz), 1994n = P/1994 N2
(McNaught-Hartley), 1994o = P/1994 P1 (Machholz 2), 1994r = C/1994 T1
(Machholz) and 1994u = P/1994 X1 (McNaught-Russell). In general, there
will not be new-style designations for comet recoveries, and use will
be made instead of the sequential numbers given for such comets
on MPC 24252 (e.g., 73P/Schwassmann-Wachmann 3 for the recovery 1994w).
The first-return comet recovery 1994v = 1990a = 1990 X becomes P/1994 V1
(Wild 4) and will receive a sequential number shortly.
SUPERNOVA 1994ak IN NGC 2782
P. Garnavich, P. Challis, A. Riess and R. Kirshner, Center for
Astrophysics, report that a spectrum of SN 1994ak was obtained by P.
Berlind on 1994 Dec. 28.45 UT with the 1.5-m Tillinghast Telescope on
Mt. Hopkins. The spectrum shows strong, narrow (FWHM 400 km/s) Balmer
emission lines near the redshift of NGC 2782, superposed on a featureless
blue continuum. He I (587.5 nm and 667.8 nm) is also present. The
base of the lines is broad (full width at the continuum of 5000 km/s),
and a weak P-Cyg absorption appears with the minimum at -600 km/s. The
estimated absolute magnitude of this object implies that it is a
supernova. The Balmer emission is similar to that observed in SN 1988Z,
and 1994ak is therefore likely to be "type IIn" (Schlegel 1990,
MNRAS 244, 269) at an early phase.
1995 January 9 (6124) Brian G. Marsden
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